There is no operator given an in such cases it is often taken to be multiplication eg ab = a*b
Thus 2*(-4)*(3) = -24
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5(-2)+(-3)(-4) =-(10)+12 =2
The equation 4x + 5 = 2 has the solution 4x = -3 and x = - 3/4 (minus 3/4).
x = 5 y = 2 4x - 3y = ? 4(5) - 3(2) = ? 20 - 6 = 14
Solving by the elimination method gives: x = 3 and y = 2
x+y=-8 2x-y=4 y=-x-8 2x+x+8=4 3x=-4 x=-4/3 -4/3 + y= -8 y = -8 + 4/3 y= -6 2/3